On whether common glycolic acid can remove dark spots
Nowadays, people often doubt that common glycolic acid can remove dark spots? To understand this, we should investigate its properties and functions in detail.

Glycolic acid belongs to the class of fruit acids, which have small molecules and strong penetration. The effect on the skin is to accelerate the metabolism of the stratum corneum. The stratum corneum of the skin is thick when accumulated for a long time, which hinders the skin's respiration and nutrient absorption, and may cause dull skin tone. Glycolic acid can loosen the connection between keratinocytes, promote the shedding of old and waste keratin, and make the skin surface renewed and radiant.

As for dark spots, the cause is complicated, mostly due to the excessive production of melanin by melanocytes, which is transported to keratinocytes and accumulated. Glycolic acid can block the formation path of melanin and reduce the amount of melanin. It can promote keratin metabolism, make melanin-containing keratinocytes quickly detach, and reduce the color of dark spots. It can also stimulate the collagen production in the dermis, make the skin firm, and help improve the texture of the skin around dark spots.

However, its effect may also vary in your mileage. Those with sensitive skin may feel uncomfortable using it, such as tingling and redness. Because glycolic acid has certain irritation to the skin. Therefore, a skin test is required before use, and the concentration and frequency of use are gradually increased from a low concentration to build skin tolerance.

In short, common glycolic acid has a certain effect on removing dark spots, but users should use it cautiously according to their own skin type to get good results.